21 Aralık 2008 Pazar

Dinosaur Dads Played "Mr. Mom"?

The paternal care common among birds may have its origins among dinosaurs closely related to Velociraptor, reports a new study. Researchers studying the evolution of reproduction in the swift and carnivorous creatures, which are believed to have evolved into birds, found that one species, Troodon, frequently laid large clutches of eggs.

"By volume, these dinosaurs were laying clutches that were two to three times larger than what would be expected for their adult body size, and we wanted to know why," said study author David Varricchio, a paleontologist at Montana State University, whose research appears in tomorrow's issue of the journal Science.


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